Add custom control to ASP.Net Panel

Question

0.00/5 (No votes)

See more:

My code is as follows:

<asp:UpdatePanel runat="server" ID="upPanel1">
<ContentTemplate>
<asp:Panel ID="pnlPartners" runat="server">
</asp:Panel>
<asp:LinkButton ID="btnAddControl" OnClick="btnAddControl_Click" runat="server" Text="Add Control" />
</ContentTemplate>
</asp:UpdatePanel>

Now I want to add my own custom textbox control to this when I click the AddControl button. Here is the code for my btnAddControl method:

CustomTextbox ct = new CustomTextbox();
ct.LoadControl("/Controls/CustomTextbox.ascx");
pnlPartners.Controls.Add(ct);

I get no errors, I see that the update panel does a post back but the control never gets added? Any help will be greatly appreciated!

Posted 12-Jul-11 22:23pm

DominicZA

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Syed Salman Raza Zaidi · Answer 1 · 2011-07-12T23:10:00

Hi,

Check this[^]

and below code

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="SampleMenu1.aspx.cs" Inherits="SampleMenuPage1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Sample Menu</title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:Menu ID="Menu1" runat="server" OnMenuItemClick="Menu1_MenuItemClick">
            <Items>
                <asp:MenuItem Text="File">
                    <asp:MenuItem Text="Load Control1"></asp:MenuItem>
                    <asp:MenuItem Text="Load Control2"></asp:MenuItem>
                    <asp:MenuItem Text="Load Control3"></asp:MenuItem>
                </asp:MenuItem>
            </Items>
        </asp:Menu>
        <br />
        <br />
        <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
            <ContentTemplate>
                <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
            </ContentTemplate>
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="Menu1" />
            </Triggers>
        </asp:UpdatePanel>
    </form>
</body>
</html>

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class PlainSampleMenuPage : System.Web.UI.Page
{
    private const string BASE_PATH = "~/DynamicControlLoading/";
    private string LastLoadedControl
    {
        get
        {
            return ViewState["LastLoaded"] as string;
        }
        set
        {
            ViewState["LastLoaded"] = value;
        }
    }
    private void LoadUserControl()
    {
        string controlPath = LastLoadedControl;
        if (!string.IsNullOrEmpty(controlPath))
        {
            PlaceHolder1.Controls.Clear();
            UserControl uc = (UserControl)LoadControl(controlPath);
            PlaceHolder1.Controls.Add(uc);
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        LoadUserControl();
    }
    protected void Menu1_MenuItemClick(object sender, MenuEventArgs e)
    {
        MenuItem menu = e.Item;
        string controlPath = string.Empty;
        switch (menu.Text)
        {
            case "Load Control2":
                controlPath = BASE_PATH + "SampleControl2.ascx";
                break;
            case "Load Control3":
                controlPath = BASE_PATH + "SampleControl3.ascx";
                break;
            default:
                controlPath = BASE_PATH + "SampleControl1.ascx";
                break;
        }
        LastLoadedControl = controlPath;
        LoadUserControl();
    }
}

Monjurul Habib · Answer 2 · 2011-07-12T23:30:00

Solution 2

I found it here

Posted 12-Jul-11 23:30pm

Monjurul Habib

Comments

Syed Salman Raza Zaidi 13-Jul-11 5:33am

but i think ur problem has now resolved

Monjurul Habib 13-Jul-11 6:01am

why you are asking me?? ask OP :)

DominicZA 13-Jul-11 10:05am

Works, kind of. I need to keep adding my custom text box as many times as its needed. I removed the line that clears the placeholder, the problem is when ever that after it adds the second control it keeps overwritting that control? Now what?

Monjurul Habib 13-Jul-11 11:18am

Share your recent code.